Features 1.Multi User: TENS electronic stimulator is designed with 4 independent output channels, which can be enjoyed by one or more people at the same time. 2.20 Gears Strength: 15 modes, 20 gear strength, intelligent and multi functional personalized physiotherapy, which is suitable for all kinds of people. 3.Low Frequency Pulse: TENS electric stimulator is combining meridian pulse technology with medical massage principle, massage is more comfortable. 4.Smooth Waveform: Pulse waveform is designed according to Chinese research and development, which conforms to Chinese usage habits, has no tingling. 5.Buckle Design: White electric pulse stimulator machine is portable and compact, and can be inserted into a belt or other places, and is more comfortable and safe. Specification Item Type: Electric Pulse Massager Material: ABS,PC Standby Current: 10uA Battery: 1.5V 3pcs AAA battery (not included) Main Body Size: Approx. 106 x 70 x 25mm / 4.2 x 2.8 x 1in Battery Life: 21 days (calculated by the maximum gear) Working Temperature: 0-45 Color: White Package List 1 x Electric Pulse Massager 8 x Pulse Patches 1 x Instruction 4 x Connecting Wires